/* =============================================
   YULIETH MARTÍNEZ — yuliethmartinez.com
   Ultra-minimal. B&W. Editorial.
   ============================================= */

/* Fonts */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=Inter:wght@300;400;500;600&display=swap');

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { min-height: 100vh; }
img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; font: inherit; }

/* Variables */
:root {
  --serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, sans-serif;

  --black:    #0a0a0a;
  --white:    #ffffff;
  --gray-50:  #fafafa;
  --gray-100: #f4f4f4;
  --gray-200: #e5e5e5;
  --gray-400: #9a9a9a;
  --gray-600: #525252;
  --gray-800: #1f1f1f;

  --max-w:   1200px;
  --read-w:   680px;
  --header-h: 68px;

  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
}

/* Body */
body {
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--black);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Header ─────────────────────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-200);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--black);
  white-space: nowrap;
  flex-shrink: 0;
}

/* Desktop nav */
.site-nav {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
}

.site-nav > a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-600);
  letter-spacing: 0.01em;
  white-space: nowrap;
  position: relative;
  transition: color 0.2s var(--ease);
}

.site-nav > a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 1px;
  background: var(--black);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}

.site-nav > a:hover { color: var(--black); }
.site-nav > a:hover::after { transform: scaleX(1); }

/* Hide bogotek inside nav on desktop */
.nav-bogotek { display: none !important; }

/* Bogotek button (outside nav, desktop only) */
.btn-bogotek {
  flex-shrink: 0;
  padding: 0.5rem 1rem;
  border: 1.5px solid var(--black);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  white-space: nowrap;
  color: var(--black);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.btn-bogotek:hover { background: var(--black); color: var(--white); }

/* Hamburger */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 6px;
  margin-left: auto;
  flex-shrink: 0;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--black);
  transition: all 0.25s var(--ease);
  transform-origin: center;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.menu-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ── Mobile nav ──────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0.5rem 0;
    z-index: 199;
    box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  }

  .site-nav.open { display: flex; }

  .site-nav > a {
    width: 100%;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    color: var(--gray-800);
    border-bottom: 1px solid var(--gray-100);
  }
  .site-nav > a::after { display: none; }

  .nav-bogotek {
    display: flex !important;
    align-items: center;
    width: 100%;
    padding: 1rem 2rem !important;
    border: none !important;
    font-size: 0.9rem !important;
    color: var(--black) !important;
    font-weight: 600 !important;
  }

  .btn-bogotek { display: none; }
  .menu-toggle { display: flex; }
}

/* ── Page wrap ───────────────────────────────────────────────────────── */
.page-wrap { padding-top: var(--header-h); }

/* ── Containers ──────────────────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

.container-read {
  max-width: var(--read-w);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── Hero ────────────────────────────────────────────────────────────── */
.hero {
  padding: 6rem 0 5rem;
  border-bottom: 1px solid var(--gray-200);
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  gap: 5rem;
}

.hero-content {
  flex: 1;
  min-width: 0;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3.125rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  max-width: 15em;
  margin-bottom: 1.75rem;
}

.hero-sub {
  font-size: 1.1rem;
  line-height: 1.75;
  color: var(--gray-600);
  max-width: 38em;
  margin-bottom: 2.5rem;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

/* ── Photo frame (hero + about) ──────────────────────────────────────── */
.photo-frame {
  display: inline-block;
  padding: 10px;
  border: 1px solid var(--gray-200);
  line-height: 0; /* elimina espacio bajo la imagen */
  flex-shrink: 0;
}

.photo-frame img {
  display: block;
  border-radius: 3px;
  filter: grayscale(100%);
  transition: filter 0.4s var(--ease);
}

.photo-frame:hover img { filter: grayscale(60%); }

/* Hero photo */
.hero-photo {
  flex-shrink: 0;
}

.hero-photo .photo-frame img {
  width: 220px;
  height: auto;
}

/* About photo */
.about-photo {
  margin-bottom: 3rem;
}

.about-photo .photo-frame img {
  width: 340px;
  height: 340px;
  object-fit: cover;
  object-position: center top;
}

/* ── Logo mark ───────────────────────────────────────────────────────── */
.logo-mark {
  width: 26px;
  height: 26px;
  object-fit: contain;
  flex-shrink: 0;
}

/* ── Buttons ─────────────────────────────────────────────────────────── */
.btn-primary {
  display: inline-block;
  padding: 0.8rem 1.75rem;
  background: var(--black);
  color: var(--white);
  font-family: var(--sans);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: opacity 0.2s var(--ease);
}
.btn-primary:hover { opacity: 0.78; color: var(--white); }

.btn-secondary {
  display: inline-block;
  padding: 0.8rem 1.75rem;
  border: 1.5px solid var(--black);
  color: var(--black);
  font-family: var(--sans);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.btn-secondary:hover { background: var(--black); color: var(--white); }

.btn-outline-white {
  display: inline-block;
  padding: 0.875rem 2.25rem;
  border: 1.5px solid rgba(255,255,255,0.4);
  color: var(--white);
  font-family: var(--sans);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: border-color 0.2s, background 0.2s;
}
.btn-outline-white:hover { border-color: var(--white); background: rgba(255,255,255,0.1); color: var(--white); }

/* ── Credibility strip ───────────────────────────────────────────────── */
.credibility {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--gray-200);
  background: var(--gray-50);
}

.credibility-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  gap: 0.625rem;
  flex-wrap: wrap;
  align-items: center;
}

.cred-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-right: 0.25rem;
  white-space: nowrap;
}

.cred-item {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gray-600);
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--gray-200);
  background: var(--white);
  white-space: nowrap;
}

/* ── Home intro ──────────────────────────────────────────────────────── */
.home-intro {
  padding: 5rem 0;
  border-bottom: 1px solid var(--gray-200);
}

.home-intro p {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--gray-800);
  max-width: 38em;
  margin-bottom: 1.375rem;
}
.home-intro p:last-child { margin-bottom: 0; }

.home-intro a {
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity 0.2s;
}
.home-intro a:hover { opacity: 0.65; }

.home-intro ul {
  list-style: none;
  margin: 1.5rem 0;
  padding: 0;
  max-width: 36em;
}
.home-intro ul li {
  padding: 0.625rem 0 0.625rem 1.75rem;
  position: relative;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--gray-800);
  border-bottom: 1px solid var(--gray-100);
}
.home-intro ul li:first-child { border-top: 1px solid var(--gray-100); }
.home-intro ul li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--gray-400);
  font-weight: 300;
}

/* ── Section heading ─────────────────────────────────────────────────── */
.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 3rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--gray-200);
}

.section-heading h2 {
  font-family: var(--serif);
  font-size: 1.625rem;
  font-weight: 400;
  letter-spacing: -0.015em;
}

.section-heading a {
  font-size: 0.8125rem;
  color: var(--gray-400);
  text-decoration: underline;
  text-underline-offset: 3px;
  white-space: nowrap;
  transition: color 0.2s;
}
.section-heading a:hover { color: var(--black); }

/* ── Articles grid ───────────────────────────────────────────────────── */
.articles-section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--gray-200);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem 2rem;
}

/* ── Card ────────────────────────────────────────────────────────────── */
.card a {
  display: flex;
  flex-direction: column;
}

.card-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--gray-100);
  margin-bottom: 1rem;
}
.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.card:hover .card-image img { transform: scale(1.04); }

.card-image.no-image {
  display: flex;
  align-items: center;
  justify-content: center;
}
.card-image.no-image::after {
  content: 'YM';
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-200);
  letter-spacing: -0.02em;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.card-category {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-400);
}
.card-sep { font-size: 0.6875rem; color: var(--gray-200); }
.card-date { font-size: 0.6875rem; color: var(--gray-400); }

.card-title {
  font-family: var(--serif);
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--black);
  transition: color 0.2s;
}
.card:hover .card-title { color: var(--gray-600); }

/* ── Home CTA ────────────────────────────────────────────────────────── */
.home-cta {
  padding: 7rem 2rem;
  background: var(--black);
  color: var(--white);
  text-align: center;
}

.home-cta h2 {
  font-family: var(--serif);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  line-height: 1.2;
}

.home-cta p {
  font-size: 1.0625rem;
  color: rgba(255,255,255,0.65);
  max-width: 34em;
  margin: 0 auto 2.75rem;
  line-height: 1.75;
}

/* ── Footer ──────────────────────────────────────────────────────────── */
.site-footer {
  padding: 2.25rem 0;
  border-top: 1px solid var(--gray-200);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--gray-400);
}

.footer-links {
  display: flex;
  gap: 1.75rem;
}
.footer-links a {
  font-size: 0.8125rem;
  color: var(--gray-400);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--black); }

/* ── Post: header ────────────────────────────────────────────────────── */
.post-header {
  padding: 4.5rem 0 3rem;
  border-bottom: 1px solid var(--gray-200);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 1.5rem;
}

.post-category {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.post-date {
  font-size: 0.75rem;
  color: var(--gray-400);
}

.post-title {
  font-family: var(--serif);
  font-size: clamp(1.875rem, 4.5vw, 3rem);
  font-weight: 700;
  line-height: 1.13;
  letter-spacing: -0.025em;
  max-width: 20em;
  margin-bottom: 1.375rem;
}

.post-description {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--gray-600);
  max-width: 34em;
}

/* ── Post: featured image ────────────────────────────────────────────── */
.post-featured-image {
  margin: 3rem auto;
}
.post-featured-image img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
}

/* ── Post: body ──────────────────────────────────────────────────────── */
.post-body {
  padding: 3.5rem 0 5rem;
}

.post-body > * + * { margin-top: 1.5rem; }

.post-body h2 {
  font-family: var(--serif);
  font-size: 1.625rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.25;
  margin-top: 3rem;
}

.post-body h3 {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
  margin-top: 2.5rem;
}

.post-body h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 2rem;
  letter-spacing: 0.01em;
}

.post-body p {
  font-size: 1.0625rem;
  line-height: 1.875;
  color: var(--gray-800);
  hyphens: auto;
}

.post-body strong { font-weight: 600; color: var(--black); }
.post-body em { font-style: italic; }

.post-body a {
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}
.post-body a:hover { color: var(--gray-600); }

.post-body ul,
.post-body ol {
  padding-left: 1.5rem;
}

.post-body li {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--gray-800);
  margin-bottom: 0.5rem;
}

.post-body blockquote {
  border-left: 3px solid var(--black);
  padding: 0.25rem 1.5rem;
  margin: 2.5rem 0;
  color: var(--gray-600);
  font-style: italic;
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.65;
}

.post-body img {
  max-width: 100%;
  margin: 2rem auto;
  height: auto;
}

.post-body code {
  font-family: 'SF Mono', 'Courier New', Courier, monospace;
  font-size: 0.875em;
  background: var(--gray-100);
  padding: 0.15em 0.45em;
  border-radius: 3px;
  color: var(--black);
}

.post-body pre {
  background: var(--gray-100);
  padding: 1.5rem;
  overflow-x: auto;
  margin: 2rem 0;
  border-left: 3px solid var(--gray-200);
}
.post-body pre code {
  background: none;
  padding: 0;
  font-size: 0.875rem;
  line-height: 1.65;
}

.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.9375rem;
}
.post-body th {
  font-weight: 600;
  text-align: left;
  padding: 0.625rem 0.875rem;
  border-bottom: 2px solid var(--black);
  font-size: 0.8125rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.post-body td {
  padding: 0.625rem 0.875rem;
  border-bottom: 1px solid var(--gray-200);
  vertical-align: top;
  line-height: 1.5;
}

/* ── Post: tags ──────────────────────────────────────────────────────── */
.post-tags {
  max-width: var(--read-w);
  margin: 0 auto;
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--gray-200);
}
.post-tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--gray-400);
  border: 1px solid var(--gray-200);
  padding: 0.25rem 0.625rem;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
  transition: border-color 0.2s, color 0.2s;
}
.post-tag:hover { border-color: var(--black); color: var(--black); }

/* ── Post: back link ─────────────────────────────────────────────────── */
.post-back {
  padding: 2rem;
}
.post-back a {
  font-size: 0.875rem;
  color: var(--gray-400);
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  transition: color 0.2s;
}
.post-back a:hover { color: var(--black); }

/* ── Static pages (sobre mí / consultoría) ───────────────────────────── */
.page-header {
  padding: 4.5rem 0 3rem;
  border-bottom: 1px solid var(--gray-200);
}

.page-title {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.13;
  margin-bottom: 1rem;
}

.page-subtitle {
  font-size: 1.125rem;
  color: var(--gray-600);
  line-height: 1.65;
  max-width: 34em;
}

.page-body {
  padding: 4rem 0 6rem;
}
.page-body > * + * { margin-top: 1.5rem; }

.page-body h2 {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 3.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.625rem;
  border-bottom: 1px solid var(--gray-200);
  letter-spacing: -0.01em;
}
.page-body h2:first-child { margin-top: 0; }

.page-body p {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--gray-800);
  max-width: 36em;
}

.page-body a {
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity 0.2s;
}
.page-body a:hover { opacity: 0.65; }

.page-body ul {
  list-style: none;
  padding: 0;
  max-width: 36em;
}
.page-body ul li {
  padding: 0.75rem 0 0.75rem 1.75rem;
  position: relative;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--gray-800);
  border-bottom: 1px solid var(--gray-100);
}
.page-body ul li:first-child { border-top: 1px solid var(--gray-100); }
.page-body ul li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--gray-400);
}

/* ── Articles listing page ───────────────────────────────────────────── */
.articles-header {
  padding: 4.5rem 0 3rem;
  border-bottom: 1px solid var(--gray-200);
}

.articles-header h1 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.articles-header p {
  font-size: 0.9375rem;
  color: var(--gray-400);
}

.articles-page-section {
  padding: 5rem 0;
}

/* ── Responsive ──────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .header-inner { gap: 1.5rem; }
}

@media (max-width: 768px) {
  :root { --header-h: 60px; }

  .hero { padding: 3.5rem 0 3rem; }
  .hero-inner { flex-direction: column; gap: 2.5rem; align-items: flex-start; }
  .hero-photo { order: 1; }            /* foto debajo del texto en móvil */
  .hero-content { order: 0; }
  .hero-photo .photo-frame img { width: 180px; }
  .about-photo .photo-frame img { width: 260px; height: 260px; }
  .home-intro { padding: 3rem 0; }
  .articles-section { padding: 3rem 0; }
  .articles-grid { grid-template-columns: 1fr; gap: 2rem; }
  .articles-page-section { padding: 3rem 0; }

  .home-cta { padding: 5rem 1.5rem; }
  .footer-inner { flex-direction: column; gap: 1.25rem; }

  .post-header { padding: 3rem 0 2rem; }
  .post-body { padding: 2.5rem 0 4rem; }
  .page-header { padding: 3rem 0 2rem; }
  .page-body { padding: 2.5rem 0 4rem; }
  .articles-header { padding: 3rem 0 2rem; }

  .section-heading { flex-direction: column; gap: 0.5rem; }
}

@media (max-width: 480px) {
  .container,
  .container-read { padding: 0 1.25rem; }
  .hero-inner { padding: 0 1.25rem; }
  .hero h1 { font-size: 1.875rem; }
  .hero-ctas { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-secondary { text-align: center; }
  .credibility-inner { padding: 0 1.25rem; }
  .footer-inner { padding: 0 1.25rem; }
}